Police are looking for four people wanted for knocking a city police officer onto the subway tracks in Queens over the weekend.

They say the two men and two women seen in surveillance video walked through the service gate at the Parsons/Archer Avenue E train station without paying their fare early Sunday morning.

Two officers tried to stop them.

Investigators say the group ran away, and one of the men knocked one of the officers onto the tracks.

The other officer helped his partner up, but they lost sight of the group.

Anyone with information on either case should contact the Crime Stoppers hotline at 1-800-577-TIPS, or text CRIMES and then enter TIP577, or visit www.crimestoppers.com.